Why can't it work in the sense of every unit who clicks the button adds to the strength of the fieldworks, that the whole side then gets to use? People would use it a lot more, and it would make far more sense.
This might be feasible to code.
Your whole army fights better the more people you have on the right settings, but we stop penalizing people who forget to check, and just have them fight alongside everyone else rather than charging out front like an idiot, or staying behind.
This would be fiendishly difficult to code.
There's a reason Organization went away.